/*
 * Copyright 2010 Alessandro Bellucci
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.soupframework.gwt.designerpanel.client.command.impl;

import org.soupframework.gwt.designerpanel.client.designer.impl.AbsolutePanelViewDesigner;
import org.soupframework.gwt.designerpanel.client.grid.Grid.GridVertex;
import org.soupframework.gwt.designerpanel.client.util.Util;

import com.google.gwt.user.client.ui.Widget;

public class AbsolutePanelAlignToGridCommand<T> extends AbsolutePanelDesignerCommandBase<T> {

	private T object;
	private int oldWidgetTop;
	private int oldWidgetLeft;

	AbsolutePanelAlignToGridCommand(AbsolutePanelViewDesigner<T> designer, T object) {
		super(designer);
		this.object = object;
	}

	@Override
	protected void doCommandInt() {
		Widget w = this.getDesigner().getChildObjectView(object);

		// save old widget state
		this.oldWidgetTop = Util.getWidgetStyleTop(w);
		this.oldWidgetLeft = Util.getWidgetStyleLeft(w);

		if(this.getDesigner().getManager().getDesignerPanel().getGrid() != null){
			Integer left = Util.getWidgetStyleLeft(w);
			Integer top = Util.getWidgetStyleTop(w);
			if(left != null && top != null){
				GridVertex gridVertex = this.getDesigner().getManager().getDesignerPanel().getGrid().getClosestGridVertex(left, top);
				left = gridVertex.getX();
				top = gridVertex.getY();
				super.setWidgetPositionImpl(w, left, top, true);
			}
		}
	}

	@Override
	protected void undoCommandInt() {
		// restore old widget state
		super.setWidgetPositionImpl(this.getDesigner().getChildObjectView(object), oldWidgetLeft, oldWidgetTop, true);
	}
}
